China has opened a new front in its pressure campaign against Taiwan with a series of spying allegations and confessions aired on state television, denounced on the democratic island as entrapment and another reason for people to fear visiting China.

China views Taiwan as its sovereign territory and has stepped up a campaign to assert its claim, including sending fighter jets near the island.

Taiwan President Tsai Ing-wen says the island will not provoke but will defend itself.

Starting on Sunday evening, Chinese state television has been showing what it says are detained Taiwanese spies who have been operating in China, and confessing to their crimes.

China, under its Thunder-2020 campaign, has cracked hundreds of cases orchestrated by Taiwan’s intelligence forces to “infiltrate and damage” and set up a network of spies, state television said.

The Global Times, a widely read Chinese tabloid run by the Communist Party’s official People’s Daily, said on Wednesday the revelations were a warning to “Taiwan separatist forces”.

Taiwan says China is framing and entrapping people, and that putting people on television to confess crimes before going to trial is a serious breach of proper legal process, something rights groups have long criticised Beijing for doing.

Speaking to reporters on Tuesday, Taiwan Premier Su Tseng-chang said China was spreading slander and “creating terror”.

Asked about Taiwan’s spying in China – both sides have long accused each other of running espionage networks – Su said Taiwan did not do that anymore and did not need to.

“China is an authoritarian country, and always does this kind of infiltration and damage, so it thinks others do it too. They don’t know that Taiwan has been democratic and open for ages.”

Taiwan has taken particular umbrage at what it says are obvious inaccuracies in some of China’s accusations, including that one of the accused spies previously worked for a former chairman of the ruling Democratic Progressive Party (DPP), Cho Jung-tai. Cho says he did not know the man.

It has not been possible to reach any of the suspected spies for comment, and unclear if they have been permitted legal representation.

China’s Taiwan Affairs Office did not respond to a request for comment.

Wang Ting-yu, a senior DPP lawmaker who sits on parliament’s foreign affairs and defence committee, said the cases should serve as a warning to Taiwanese wishing to visit China.

“Think of the risks … any Taiwanese person, no matter their political positions of beliefs or party background, is simply a tool.”

Reuters